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Open AccessArticle

Photo-Fenton Degradation of Pentachlorophenol: Competition between Additives and Photolysis

1
Chemistry Department, University of Torino, 10125 Torino, Italy
2
Group of Advanced Oxidation Processes, Department of Textile and Paper Engineering, Universitat Politècnica de València, 03801 Alcoy, Spain
*
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(8), 1157; https://doi.org/10.3390/nano9081157
Received: 10 July 2019 / Revised: 30 July 2019 / Accepted: 7 August 2019 / Published: 13 August 2019
(This article belongs to the Special Issue Sustainable and Safe Nano-Enabled Water Treatment Applications)
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Abstract

In the present work, the photo-Fenton degradation of pentachlorophenol (PCP, 1 mg/L) has been studied under simulated and natural solar irradiation; moreover, the effect on the process efficiency of urban waste-derived soluble bio-based substances (SBO), structurally comparable to humic acids, has been investigated. Experiments showed a crucial role of PCP photolysis, present in the solar pilot plant and hindered by the Pyrex® filter present in the solar simulator. Indeed, the SBO screen negatively affects PCP degradation when working under natural solar light, where the photolysis of PCP is relevant. In contrast, in the absence of PCP photolysis, a significant improvement of the photo-Fenton process was observed when added to SBO. Furthermore, SBO were able to extend the application of the photo-Fenton process at circumneutral pH values, due to their ability to complex iron, avoiding its precipitation as oxides or hydroxides. This positive effect has been observed at higher concentration of Fe(II) (4 mg/L), whereas at 1 mg/L, the degradation rates of PCP were comparable in the presence and absence of SBO. View Full-Text
Keywords: pentachlorophenol; photo-Fenton; solar light; bio-based substances; urban waste pentachlorophenol; photo-Fenton; solar light; bio-based substances; urban waste
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Vergura, E.P.; Garcia-Ballestreros, S.; Vercher, R.F.; Santos-Juanes, L.; Bianco Prevot, A.; Arques, A. Photo-Fenton Degradation of Pentachlorophenol: Competition between Additives and Photolysis. Nanomaterials 2019, 9, 1157.

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